Forgot to add, by "it downloads quickly" I meant to imply that when I manually
end the session (because it begins taking far too long) I notice that the
first few pages are there, but unfortunately with a lot of other stuff
unrelated to the thread (which is the reason it's taking so long and forcing
me to end the session).

All I need is everything like:
<http://www.website.com/printthread.php?t=24680&pp=40&page=1>
<http://www.website.com/printthread.php?t=24680&pp=40&page=2>
<http://www.website.com/printthread.php?t=24680&pp=40&page=3>
etc

and just the images inside those threads, that's it